Answer:
C) if the speaker can think objectively about the issue.
Explanation:
A man who was injured in a terrorist attack is unlikely to be able to be objective about politics and terrorism. He probably feels a strong personal connection with the subject. Moreover, he is likely to think about terrorism in a personal way, and not in a way that addresses the needs of all people. Therefore, the audience should be aware of this fact so that they can more easily spot prejudice or bias in his speech.
